2129 papers
Hep-Ex explores the fascinating intersection where particle physics meets experimental reality. This field investigates how scientists build massive detectors and accelerate particles to test the fundamental laws of nature, turning abstract theories into measurable data. It is the rigorous process of searching for new particles or forces that could reshape our understanding of the universe, often requiring years of collaboration and engineering.
At Gist.Science, we ensure these discoveries become accessible to everyone. We process every new preprint in this category directly from arXiv, generating both plain-language explanations for curious readers and detailed technical summaries for specialists. Our goal is to bridge the gap between complex experimental results and public understanding without losing scientific nuance.
Below are the latest papers in Hep-Ex, freshly summarized and ready for you to explore.
This paper evaluates the REDTOP experiment's potential to discover physics beyond the Standard Model and probe discrete symmetries by leveraging its unprecedented dataset of and mesons to search for hidden sectors via four specific portals while simultaneously refining crucial inputs for the muon anomalous magnetic moment.
Using state-of-the-art 3D simulations, this paper assesses how magnetorotational stellar core collapses contribute to the diffuse supernova neutrino background, finding that they enhance the high-energy spectrum and could significantly accelerate the detection of this background or allow for the measurement of their occurrence fraction in future neutrino observatories.
This paper analyzes the synergy between future Tera- factories (such as FCC-ee or CEPC) and non-collider dark matter searches, demonstrating that high-precision electroweak measurements can effectively probe new physics scenarios involving dark matter and a -channel mediator.
This paper proposes that the SHIFT@LHC fixed-target concept could enable the first-ever detection of neutrinos in general-purpose LHC detectors (CMS and ATLAS), predicting approximately 10,000 muon-neutrino and 1,000 electron-neutrino interactions from proton-gas collisions to provide unique access to hadron production in the pseudorapidity range of 5 to 8.
This paper revises the Standard Model description of the rare decays by incorporating the previously overlooked cascade contribution, which significantly enhances the predicted decay rate and achieves unprecedented agreement with LHCb data while maintaining consistency with hadronic parameters from analogous four-body decays.
Using the A2 facility at the Mainz Microtron, researchers achieved the highest statistical accuracy to date for the Dalitz decay by analyzing 2.4 million events to determine the electromagnetic transition form factor slope parameter as , a result consistent with existing measurements but with reduced uncertainty.
The paper introduces HDSense, a computationally efficient metric that ranks observable sensitivity by balancing information content and redundancy using one-dimensional histograms, enabling the identification of near-optimal parameter-constraining subsets for complex models like hadronization without requiring full likelihood calculations.
This paper demonstrates that while next-generation neutrino observatories like Jinping could theoretically detect the intense neutrino burst from a stellar helium flash out to nearly 3 parsecs, the absence of suitable nearby red giant candidates currently makes asteroseismology the only viable method for studying these events.
Using 5.4 fb of LHCb proton-proton collision data at 13 TeV, the paper reports a measurement of the branching fraction ratio , which is consistent with Standard Model predictions within 1.8 standard deviations.
This paper extends the baryo-charmonium model to the doubly-strange sector to predict a distinct pattern of negative-parity hidden-charm pentaquarks, characterized by a near-degenerate doublet of kaon-associated states and masses consistent with recent molecular and QCD sum-rule calculations.